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The article presents titles and abstracts of papers published in the January 1920 issue of the journal "Annals of the Association of American Geographers." The 'Southern Indiana,' includes the unglaciated portion of the state, the areas of Pre-wisconsin drift on each side of the unglaciated tract, and the margin of the area of Wisconsin drift border has been largely determined by geologic structure. In the title 'The Geographic Factors in the Distribution of Animals, with particular reference to the distribution of the land Reptiles of the Davis Mountains Region, Texas,' the distribution of the land reptiles of the Davis Mountains Region, Texas, shows that the zonal distribution is less than would be expected on the life-zone theory and that there is evidence that other geographic factors than climate are to be recognized.

Presents abstracts of geography-related papers, as of March 1926. "The Status of Zoogeography in North America," by Chas. C. Adams; "Settlement and Economic Development of the San Juan Region of Colorado," by Wallace W. Atwood; "Culture and Landscape at Madison, Wisconsin," by V.C. Finch.

The article discusses Mexican American, Negro, and Anglo improvement in labor force status between 1960 and 1970 in Racine, Wisconsin. This paper is concerned with the level of economic absorption of immigrants (compared to the Anglo population in Racine) as measured by changes in their occupation, income, and employment status between 1960 and 1970-71. The paper utilized U.S. Census data for 1960 and 1970 in order to compare Mexican Americans and Anglos in Texas and Negroes and Whites in Mississippi with their counterparts in Racine. Statistics generated from the Texas, Mississippi, and Racine Census data were in turn compared with statistics based on the authors' survey research data. The latter were taken from a longitudinal study of the processes of economic absorption and cultural integration among samples of predominantly immigrant Mexican Americans and Negroes, whose 1960 and 1971 interview data were compared with that of a control group of Anglos, half of whom were themselves immigrants.

The article discusses the acetylene reduction in relaxation to levels of phosphate and fixed nitrogen in Green Bay. This paper reports data collected during the summer of 1971 in the southern part of Green Bay of Lake Michigan. This study undertook to characterize acetylene reduction and nutrient levels throughout the summer. Water samples were collected. Phytoplankton characteristically increase rapidly in the spring. A high soluble phosphate concentration in the water preceded all major increases in the population of heterocystous, nitrogen-fixing blue-green algae.

The purpose of this paper is the analysis of the interactional patterns of Wisconsin farm couples with their parents. Step-wise multiple regression analysis provides a technique to solve a sequence of one or more multiple linear models by step-wise application of the least sum-of-squares method. The predictor variables used in this analysis include: distance, husband's age, stage in the family life-cycle, husband's education, wife's education, gross farm income, agricultural training of the husband, productive-man-work-units, and level of living. The results showed that distance is an important factor in the interaction between generations in rural areas. [ABSTRACT FROM AUTHOR]